Define a default timeout for email deliverability validation (15s)

Author: osantana

email_validator/__init__.py

@@ -39,6 +39,8 @@
 	DOT_ATOM_TEXT = DOT_ATOM_TEXT.decode("ascii")
 	ATEXT_HOSTNAME = ATEXT_HOSTNAME.decode("ascii")
 
+DEFAULT_TIMEOUT = 15  # secs
+
 class EmailNotValidError(ValueError):
 	"""Parent class of all exceptions raised by this module."""
 	pass
@@ -56,7 +58,7 @@ def validate_email(
 	allow_smtputf8=True,
 	allow_empty_local=False,
 	check_deliverability=True,
-	timeout=0):
+	timeout=DEFAULT_TIMEOUT):
 
 	"""Validates an email address, raising an EmailNotValidError if the address is not valid or returning a dict of information
 	when the address is valid. The email argument can be a str or a bytes instance, but if bytes it must be ASCII-only."""
@@ -234,7 +236,7 @@ def validate_email_domain_part(domain):
 		"domain_i18n": domain_i18n,
 	}
 
-def validate_email_deliverability(domain, domain_i18n, timeout=0):
+def validate_email_deliverability(domain, domain_i18n, timeout=DEFAULT_TIMEOUT):
 	# Check that the domain resolves to an MX record. If there is no MX record,
 	# try an A or AAAA record which is a deprecated fallback for deliverability.